/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
	This file is part of foam-extend.

	foam-extend is free software: you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation, either version 3 of the License, or (at your
	option) any later version.

	foam-extend is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "axisCoordinateRotation.H"

#include "Switch.H"
#include "mathematicalConstants.H"
#include "dictionary.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
	defineTypeNameAndDebug(axisCoordinateRotation, 0);
	addToRunTimeSelectionTable
	(
		coordinateRotation,
		axisCoordinateRotation,
		dictionary
	);
}

// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

void Foam::axisCoordinateRotation::calcTransform
(
	const scalar phiAngle,
	const scalar thetaAngle,
	const scalar psiAngle,
	const bool inDegrees
)
{
	scalar phi   = phiAngle;
	scalar theta = thetaAngle;
	scalar psi   = psiAngle;

	if (inDegrees)
	{
		phi *= mathematicalConstant::pi/180.0;
		theta *= mathematicalConstant::pi/180.0;
		psi *= mathematicalConstant::pi/180.0;
	}

	tensor::operator=
	(
		tensor
		(
			cos(theta)*cos(psi),
			sin(phi)*sin(theta)*cos(psi) - cos(phi)*sin(psi),
			cos(phi)*sin(theta)*cos(psi) + sin(phi)*sin(psi),

			cos(theta)*sin(psi),
			sin(phi)*sin(theta)*sin(psi) + cos(phi)*cos(psi),
			cos(phi)*sin(theta)*sin(psi) - sin(phi)*cos(psi),

			-sin(theta),
			sin(phi)*cos(theta),
			cos(phi)*cos(theta)
		)
	);
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::axisCoordinateRotation::axisCoordinateRotation
(
	const scalar phiAngle,
	const scalar thetaAngle,
	const scalar psiAngle,
	const bool inDegrees
)
:
	coordinateRotation()
{
	calcTransform(phiAngle, thetaAngle, psiAngle, inDegrees);
}


Foam::axisCoordinateRotation::axisCoordinateRotation
(
	const dictionary& dict
)
:
	coordinateRotation()
{
	scalar phi = readScalar(dict.lookup("phi"));
	scalar theta = readScalar(dict.lookup("theta"));
	scalar psi = readScalar(dict.lookup("psi"));

	calcTransform
	(
		phi,
		theta,
		psi,
		dict.lookupOrDefault<Switch>("degrees", true)
	);
}


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
